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If cot A + cosec A = and A is an acute angle, then the value of cos A is

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Answer 1

Step-by-step explanation:

Answer:

cot A + cosec A=3

cos A/sin A + 1/sin A =3

(cos A+ 1)/sin A = 3

(cos A+1)/(1-cos^2 A)^.5=3

squaring on both the sides

(cos A+1)^2/(1+cos A)(1- cos A) =9

(cos A+1)/(cos A-1) = 9

(cos A+1) = 9cos A -9

9cos A - cos A = 9+1

8 Cos A = 10

Cos A = 10/8

Cos A = 1.25

Answer 2

Answer:

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Step-by-step explanation:

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